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Hmmm, what about control panels? Factory mounted electrical devices, such as motor starters? Remote mounted starters? Interlocks, such as aux contacts in pump starters, and flow switches? Electrical knowledge is needed, but I don't think a license is. PPE? I would be agreeable to certification being required.

Hmmm, what about control panels? Factory mounted electrical devices, such as motor starters? Remote mounted starters? Interlocks, such as aux contacts in pump starters, and flow switches? Electrical knowledge is needed, but I don't think a license is. PPE? I would be agreeable to certification being required.

These things sound like they can be done in a plant under engineering supervision. A license is not needed when that level of supervision is in play.

I should have been more specific, but I was actually thinking of a visiting contractor (an OEM rep) troubleshooting and repairing not only the equipment he reps, but any and all equipment that is associated with it. Such as a chiller and it's associated pumps, ahu's, cooling tower, etc... And many of these are for comfort cooling where there is not even a single maintenance person on staff.

I should have been more specific, but I was actually thinking of a visiting contractor (an OEM rep) troubleshooting and repairing not only the equipment he reps, but any and all equipment that is associated with it. Such as a chiller and it's associated pumps, ahu's, cooling tower, etc... And many of these are for comfort cooling where there is not even a single maintenance person on staff.

I license is not required in order to work on utilization equipment.

If he has to go into a panel to replace a bolt-in breaker, time for a license.

In many areas, notably around the three or four larger cities, the local authorities require a permit.

Also:

In 2008, the Pennsylvania Legislature passed the Home Improvement Consumer Protection Act. The law requires that all contractors who perform at least $5,000 worth of home improvements per year register with the Attorney General's Office.